CN113584946A - Copper card paper and manufacturing method thereof - Google Patents
Copper card paper and manufacturing method thereof Download PDFInfo
- Publication number
- CN113584946A CN113584946A CN202110686094.2A CN202110686094A CN113584946A CN 113584946 A CN113584946 A CN 113584946A CN 202110686094 A CN202110686094 A CN 202110686094A CN 113584946 A CN113584946 A CN 113584946A
- Authority
- CN
- China
- Prior art keywords
- layer
- pulp
- lining
- copper
- liner
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 132
- 239000010949 copper Substances 0.000 title claims abstract description 132
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 132
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- 239000010410 layer Substances 0.000 claims abstract description 418
- 239000000123 paper Substances 0.000 claims abstract description 133
- 239000012792 core layer Substances 0.000 claims abstract description 97
- 239000002344 surface layer Substances 0.000 claims abstract description 79
- 239000002655 kraft paper Substances 0.000 claims abstract description 55
- 239000011121 hardwood Substances 0.000 claims abstract description 43
- 239000002699 waste material Substances 0.000 claims abstract description 17
- 239000002002 slurry Substances 0.000 claims description 85
- 238000004513 sizing Methods 0.000 claims description 56
- 239000003795 chemical substances by application Substances 0.000 claims description 45
- 230000014759 maintenance of location Effects 0.000 claims description 45
- 239000011087 paperboard Substances 0.000 claims description 41
- 239000011247 coating layer Substances 0.000 claims description 28
- 239000011111 cardboard Substances 0.000 claims description 25
- 239000011122 softwood Substances 0.000 claims description 21
- 229920001131 Pulp (paper) Polymers 0.000 claims description 20
- 239000000945 filler Substances 0.000 claims description 20
- 239000003292 glue Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 12
- 239000010893 paper waste Substances 0.000 claims description 12
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 6
- 229910000906 Bronze Inorganic materials 0.000 claims 1
- 239000010974 bronze Substances 0.000 claims 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims 1
- 238000009826 distribution Methods 0.000 abstract description 7
- 230000000052 comparative effect Effects 0.000 description 14
- 239000011248 coating agent Substances 0.000 description 10
- 238000000576 coating method Methods 0.000 description 10
- 239000004744 fabric Substances 0.000 description 10
- 239000000835 fiber Substances 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 238000001914 filtration Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- -1 alkenyl succinic anhydride Chemical compound 0.000 description 4
- 230000005587 bubbling Effects 0.000 description 4
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000007645 offset printing Methods 0.000 description 4
- 238000007639 printing Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 229940014800 succinic anhydride Drugs 0.000 description 4
- 239000012790 adhesive layer Substances 0.000 description 3
- 238000002788 crimping Methods 0.000 description 3
- 230000018044 dehydration Effects 0.000 description 3
- 238000006297 dehydration reaction Methods 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 3
- 238000007581 slurry coating method Methods 0.000 description 3
- 239000005995 Aluminium silicate Substances 0.000 description 2
- 235000012211 aluminium silicate Nutrition 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 235000021197 fiber intake Nutrition 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000002761 deinking Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/30—Multi-ply
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F13/00—Making discontinuous sheets of paper, pulpboard or cardboard, or of wet web, for fibreboard production
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/02—Chemical or chemomechanical or chemothermomechanical pulp
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/02—Chemical or chemomechanical or chemothermomechanical pulp
- D21H11/04—Kraft or sulfate pulp
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/22—Addition to the formed paper
- D21H23/52—Addition to the formed paper by contacting paper with a device carrying the material
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Paper (AREA)
Abstract
The application relates to a copper card paper and a manufacturing method thereof, wherein the copper card paper comprises base paper, the base paper sequentially comprises a surface layer, a surface lining layer, a core layer, a bottom lining layer and a bottom layer, and the quantitative amount of the copper card paper is less than or equal to 250 g/square meter; wherein the pulp of the top liner and/or the bottom liner comprises hardwood kraft pulp and deinked waste pulp. The copper card paper of this application embodiment is low quantitative copper card paper, the body paper include five layers, and five layer structure can improve the inhomogeneity between each layer for the inhomogeneity of each layer can compensate each other, reduces quantitative distribution's inhomogeneity, improves the quality of copper card paper.
Description
Technical Field
The application relates to the technical field of papermaking, in particular to copper card paper and a manufacturing method thereof.
Background
With the development of printing and packaging industries, the market has higher and higher requirements on special paper, the copper card paper can be used as packaging paper and printing paper, has wider application, and has low ration, high strength and high surface quality which become a great problem in the production of the copper card paper.
Disclosure of Invention
In view of this, the technical problem that this application mainly solved is to provide a copper card paper, can improve the quality of copper card paper, reduce the ration of copper card paper, reduction in production cost.
In order to solve the technical problem, the application adopts a technical scheme that: a copper card paper comprises base paper, wherein the base paper sequentially comprises a surface layer, a surface lining layer, a core layer, a bottom lining layer and a bottom layer, and the quantitative amount of the copper card paper is less than or equal to 250 g/square meter; wherein, the pulp of the surface lining layer and the bottom lining layer comprises hardwood sulphate pulp and deinked waste paper pulp.
Wherein the mass ratio of the hardwood kraft pulp to the deinked waste paper pulp of the surface lining layer and the bottom lining layer is (40-50) to (50-60).
Wherein the coating weight ratio of the surface layer, the surface lining layer, the core layer, the bottom lining layer and the bottom lining layer is (16-20): 14-18): 45-49): 14-18): 16-20.
Wherein, the surface layer and the bottom layer both comprise softwood kraft pulp and hardwood kraft pulp, wherein the mass ratio of the softwood kraft pulp to the hardwood kraft pulp is (25-35): (45-65).
Wherein the sizing agents of the surface layer, the surface lining layer, the core layer, the bottom lining layer and the bottom layer comprise internal sizing agents, wherein the internal sizing agents account for (0.04-0.08): (0.03-0.07): (0.10-0.14): (0.04-0.08): (0.03-0.07) in the sizing agents of the surface layer, the surface lining layer, the core layer, the bottom lining layer and the bottom layer.
Wherein, the sizing agents of the surface layer, the surface lining layer, the bottom lining layer and the bottom layer respectively comprise (0-0.0002) parts by mass of retention aid, and the sizing agent of the core layer comprises (0.00005-0.00025) parts by mass of retention aid.
The copper card paper further comprises two coating layers, one coating layer is positioned on one side, away from the surface lining, of the surface layer, the other coating layer is positioned on one side, away from the bottom lining, of the bottom layer, and the quantitative quantity of the copper card paper is less than or equal to 250 g/square meter.
Wherein, the core layer comprises a filling agent, and the filling amount of the filling agent accounts for 4-6% of the absolute dry amount of the copper paperboard.
The application also comprises a second technical scheme, and the manufacturing method of the copper card paper comprises the following steps:
respectively manufacturing surface layer pulp, surface lining layer pulp, core layer pulp, bottom lining layer pulp and bottom layer pulp, wherein the surface lining layer pulp and the bottom lining layer pulp comprise hardwood sulfate pulp and deinking waste paper pulp;
respectively carrying out net-feeding forming on the surface layer slurry, the surface lining slurry, the core layer slurry, the bottom lining slurry and the bottom layer slurry with the net-feeding mass concentration of 0.2-0.26% respectively to form a surface layer net part, a surface lining net part, a core layer net part, a bottom lining net part and a bottom layer net part;
and (3) squeezing the surface layer net part, the surface lining layer net part, the core layer net part, the bottom lining layer net part and the bottom layer net part together to form a laminated layer, applying surface glue layers on the upper surface and the lower surface of the laminated layer, and drying to obtain the copper paperboard.
Wherein, dry, include before obtaining the copper card paper: and coating a coating layer on the surface adhesive layer respectively.
Wherein, the pulp-net speed ratio of the pulp of the surface layer, the pulp of the surface lining layer, the pulp of the core layer, the pulp of the bottom lining layer and the pulp of the bottom layer which are respectively formed by netting is 0.985, 0.98, 0.985, 098 and 0.965 in sequence.
The beneficial effect of this application is: different from the prior art, the base paper of the copper paperboard in the embodiment of the application is composed of five layers, the base paper of the copper paperboard is low-quantitative copper paperboard, and the base paper of the copper paperboard is made into five layers, so that different sizing agents can be adopted for each layer, and the advantages of different sizing agents can be fully utilized and exerted; the base paper of the embodiment of the application comprises five layers, and the unevenness among all layers can be improved through a five-layer structure, so that the unevenness of all layers can be mutually compensated, the unevenness of quantitative distribution is reduced, and the quality of the copper paperboard is improved.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the copper paperboard of the present application;
FIG. 2 is a schematic structural diagram of another embodiment of the copper paperboard of the present application;
FIG. 3 is a schematic flow chart illustrating an embodiment of a method for manufacturing copper cardboard according to the present invention;
fig. 4 is a schematic flow chart of another embodiment of the method for manufacturing copper cardboard.
Wherein, 10, base paper; 11. a surface layer; 12. a top lining layer; 13. a core layer; 14. a bottom lining layer; 15. a bottom layer; 20. a coating layer.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.
As shown in fig. 1, the embodiment of the present application includes a copper card paper, the copper card paper includes a base paper 10, the base paper 10 sequentially includes a surface layer 11, a surface lining layer 12, a core layer 13, a bottom lining layer 14 and a bottom layer 15, and the basis weight of the copper card paper is less than or equal to 250 g/square meter; wherein the pulp of the top liner 12 and/or the bottom liner 14 comprises hardwood kraft pulp and deinked waste pulp.
In the embodiment of the application, when the quantitative amount of the copper paperboard is less than or equal to 250 g/square meter, the copper paperboard is low-quantitative copper paperboard, and the base paper 10 of the copper paperboard is made into five layers, so that different pulps can be adopted for each layer, and the advantages of the different pulps can be fully utilized and exerted; the base paper 10 of the embodiment of the application comprises five layers, and the nonuniformity among all layers can be improved through a five-layer structure, so that the nonuniformity of all layers can be mutually compensated, the nonuniformity of quantitative distribution is reduced, and the quality of the copper paperboard is improved.
In the present embodiment, the pulp of the top liner 12 and the bottom liner 14 includes hardwood kraft pulp and deinked waste pulp, and in other embodiments, the pulp of the top liner 12 or the bottom liner 14 may include hardwood kraft pulp and deinked waste pulp.
In the examples of this application, the hardwood kraft pulp and deinked waste pulp of the top liner 12 and/or the bottom liner 14 are present in a mass ratio of (40-50) to (50-60). By controlling the mass ratio of the hardwood sulfate pulp to the deinked waste pulp within the range of (40-50) to (50-60), the mechanical strength of the top liner 12 and the bottom liner 14 can be higher, and the requirement of the copper paperboard can be met. Specifically, in the examples of the present application, the mass ratio of the hardwood kraft pulp to the deinked pulp may be 40:50, 45:50, 50:50, 45:55, 50:50, 50:55, 50:60, or the like.
In the embodiment of the application, the ratio of the sizing amounts of the surface layer 11, the surface lining layer 12, the core layer 13, the bottom lining layer 14 and the bottom lining layer 15 is (16-20): 14-18): 45-49: (14-18): 16-20. This application embodiment is through controlling surface layer 11, surface lining layer 12, sandwich layer 13, the coating volume of end liner layer 14 and bottom 15 is in above-mentioned ratio within range, make the coating volume of every layer reduce for three-layer body paper 10, through reducing the coating volume of every layer in this application embodiment, can make the copper card paper that generates be low ration, and copper card paper has excellent physical strength, can increase the deflection of copper card paper, in this application embodiment, the ration distributes at surface layer 11, surface lining layer 12, sandwich layer 13, end liner layer 14 and bottom 15, five layer structure of body paper 10 make the front and the reverse side of copper card paper all have better bearing structure, make the deflection height of copper card paper. In the embodiment of the application, the roughness of the front and the back of the copper card paper is lower, smoothness is higher, in the embodiment of the application, the slurry coating amount of the surface layer 11, the surface lining layer 12, the core layer 13, the bottom lining layer 14 and the bottom layer 15 is controlled, so that the nonuniformity of each layer can be compensated mutually, the nonuniformity of quantitative distribution is reduced, and the smoothness of the paper is improved. Specifically, in the embodiment of the present application, the ratio of the amount of the hanging paste of the top layer 11, the top liner layer 12, the core layer 13, the bottom liner layer 14 and the bottom liner layer 15 may be 16:14:45:14:16, 20:14: 20, 20:18:49:18:20, 16:18:49:14:16, 18:16:47:16:18 or 19:17:48:17:19, etc., which are only examples, and in other embodiments, the ratio of the amount of the hanging paste of the top layer 11, the top liner layer 12, the core layer 13, the bottom liner layer 14 and the bottom liner layer 15 may be other values as long as the ratio is within (16-20) - (14-18) - (45-49) - (14-18) - (16-20).
In the embodiment of the application, the surface layer 11 and the bottom layer 15 both comprise softwood kraft pulp and hardwood kraft pulp, wherein the mass ratio of the softwood kraft pulp to the hardwood kraft pulp is (25-35) to (65-75). In the embodiment of the application, the crimping degree and the distortion coefficient of the formed fibers of the surface layer 11 and the bottom layer 15 can be reduced by controlling the mass ratio of the softwood kraft pulp to the hardwood kraft pulp, so that the fibers are stretched, and the surface layer 11 and the bottom layer 15 have better stiffness and higher mechanical strength. Specifically, in the embodiment of the present application, the mass ratio of the softwood kraft pulp to the hardwood kraft pulp may be 25:65, 35:75, 30:70, 25:65, 35:70, 30:65, 28:68, 32:72, etc., which are merely examples, and in other embodiments, the mass ratio of the softwood kraft pulp to the hardwood kraft pulp may be other values as long as the mass ratio is in the range of (25-35): (65-75).
In the embodiment of the application, the sizing agents of the surface layer 11, the surface lining layer 12, the core layer 13, the bottom lining layer 14 and the bottom lining layer 15 all comprise internal sizing agents, wherein the internal sizing agents account for (0.04-0.08): 0.03-0.07): 0.10-0.14): 0.04-0.08): 0.03-0.07% in the sizing agents of the surface layer 11, the surface lining layer 12, the core layer 13, the bottom lining layer 14 and the bottom lining layer 15. In the embodiment of the application, the internal sizing agent is added into the sizing agent of each layer, and the dosage proportion of the internal sizing agent is controlled, so that the layers are combined firmly. In the embodiment of the present application, the internal sizing agent is alkenyl succinic anhydride, and in other embodiments, the internal sizing agent may be other materials. Specifically, in the present embodiment, the internal sizing agent may be present in the slurry of the top layer 11, the top liner layer 12, the core layer 13, the bottom liner layer 14, and the bottom layer 15 at a ratio of 0.04:0.03:0.10:0.04:0.03, 0.08:0.08:0.14:0.08:0.07, 0.06:0.06:0.12:0.06:0.05, or 0.05:0.05:0.13:0.07:0.06, etc. The above are merely examples, and in other embodiments, the amount of the internal sizing agent in the slurry of the top layer 11, the top liner layer 12, the core layer 13, the back liner layer 14, and the bottom layer 15 may be other values as long as the internal sizing agent is in the range of (0.04-0.08): (0.03-0.07): (0.10-0.14): (0.04-0.08): 0.03-0.07).
In the embodiment of the present application, the slurries of the top layer 11, the top liner layer 12, the bottom liner layer 14 and the bottom layer 15 respectively include (0 to 0.0002) parts by mass of a retention aid, and the slurry of the core layer 13 includes (0.00005 to 0.00025) parts by mass of a retention aid. In the examples of this application, the retention aid primarily functions to aid drainage of the slurry and to enhance retention of fine components in the slurry during wet end formation. In the embodiment of the application, the quantitative ratio of each layer is smaller during the five-layer papermaking, the water filtering speed is higher during the wet-end forming, the influence of the dehydration speed on the paper forming is larger during the wet-end forming, the water filtering speed during the wet-end forming is controlled by reducing the material ratio of the retention aid at each layer and controlling the dosage ratio of the retention aid at each layer, the probability of breakage of each layer during the forming is reduced, and the quality of each layer is improved. In the examples of the present application, the proportion of the retention aid in the slurry formed in each layer is based on the absolute dry amount. Specifically, in the present embodiment, the slurry of the face layer 11 includes 0.02 parts by mass of a retention aid, the face liner layer 12 includes 0.02 parts by mass of a retention aid, the bottom liner layer 14 includes 0.02 parts by mass of a retention aid, the slurry of the bottom layer 15 includes 0.02 parts by mass of a retention aid, and the slurry of the core layer 13 includes 0.025 parts by mass of a retention aid; or the slurry of the surface layer 11 comprises 0.01 part by mass of the retention aid, the surface lining layer 12 comprises 0.01 part by mass of the retention aid, the bottom lining layer 14 comprises 0.01 part by mass of the retention aid, the slurry of the bottom layer 15 comprises 0.01 part by mass of the retention aid, and the slurry of the core layer 13 comprises 0.015 part by mass of the retention aid; or the slurry of the surface layer 11, the surface lining layer 12, the bottom lining layer 14 and the bottom layer 15 does not comprise a retention aid, and the slurry of the core layer 13 comprises 0.005 part by mass of the retention aid; or the slurry of the surface layer 11, the surface lining layer 12, the bottom lining layer 14 and the bottom layer 15 does not comprise a retention aid, and the slurry of the core layer 13 comprises 0.020 parts by mass of the retention aid; or the slurry of the surface layer 11 includes 0.01 parts by mass of the retention aid, the surface liner layer 12 includes 0.005 parts by mass of the retention aid, the bottom liner layer 14 includes 0.12 parts by mass of the retention aid, the slurry of the bottom layer 15 includes 0.18 parts by mass of the retention aid, and the slurry of the core layer 13 includes 0.015 parts by mass of the retention aid, which are given as examples only.
In the embodiment of the present application, as shown in fig. 2, the copper card paper further includes two coating layers 20, one coating layer 21 is located on the side of the surface layer 11 away from the surface liner layer 12, the other coating layer 22 is located on the side of the bottom layer 15 away from the bottom liner layer 14, and the basis weight of the base paper 10 is equal to or less than 170 g/m. In the embodiment of the present application, the coating layers 20 are coated on the upper and lower surfaces of the base paper 10, so that the whiteness and the glossiness of the copper paperboard can be increased, and the requirements can be met. In the embodiment of the present invention, the coating layer 20 may include calcium carbonate, in other embodiments, the coating layer 20 may also be mineral substances such as china clay and kaolin, and in the embodiment of the present invention, the basis weight of the base paper 10 is equal to or less than 170 g/m, and the basis weight of the copper cardboard is equal to or less than 250 g/m, and the formed paper is low basis weight copper cardboard.
In the embodiment of the application, the core layer 13 includes a filler, and the filling amount of the filler accounts for 4% -6% of the absolute dry amount of the copper paperboard. In the embodiment of the application, the filler is added into the core layer 13, the filling amount of the filler in the core layer 13 is increased, and the fiber consumption is reduced, so that the production cost can be greatly reduced, and the water filtration performance of the core layer 13 can be improved. In the embodiment of the present application, the filling amount of the filler accounts for 5% of the absolute dry amount of the copper cardboard, and in other embodiments, the filling amount of the filler may account for 4%, 4.5%, 5.5%, 6%, or the like of the absolute dry amount of the copper cardboard.
The present application also includes a second technical solution, as shown in fig. 3 and fig. 1, a method for manufacturing a copper cardboard includes:
s110, preparing the pulp of the surface layer 11, the pulp of the surface lining layer 12, the pulp of the core layer 13, the pulp of the bottom lining layer 14 and the pulp of the bottom layer 15 respectively, wherein the pulp of the surface lining layer 12 and/or the pulp of the bottom lining layer 14 comprise hardwood sulfate pulp and deinked waste pulp.
In the embodiment of the application, the slurry corresponding to the five-layer structure is manufactured so as to be used for manufacturing the five-layer paper. In the present embodiment, the pulp of the top liner 12 and the bottom liner 14 includes hardwood kraft pulp and deinked waste pulp, and in other embodiments, the pulp of the top liner 12 or the bottom liner 14 may include hardwood kraft pulp and deinked waste pulp.
In the examples of this application, the hardwood kraft pulp and deinked waste pulp of the top liner 12 and/or the bottom liner 14 are present in a mass ratio of (40-50) to (50-60). By controlling the mass ratio of the hardwood sulfate pulp to the deinked waste pulp within the range of (40-50) to (50-60), the mechanical strength of the top liner 12 and the bottom liner 14 can be higher, and the requirement of the copper paperboard can be met.
Further, in the embodiment of the present application, the top layer 11 and the bottom layer 15 both comprise softwood kraft pulp and hardwood kraft pulp, wherein the mass ratio of the softwood kraft pulp to the hardwood kraft pulp is (25-35): (45-65). In the embodiment of the application, the crimping degree and the distortion coefficient of the formed fibers of the surface layer 11 and the bottom layer 15 can be reduced by controlling the mass ratio of the softwood kraft pulp to the hardwood kraft pulp, so that the fibers are stretched, and the surface layer 11 and the bottom layer 15 have better stiffness and higher mechanical strength.
In the embodiment of the application, the core layer 13 comprises softwood kraft pulp, deinked waste paper pulp, mechanical pulp and broke pulp, and the mass ratio of the softwood kraft pulp to the deinked waste paper pulp to the mechanical pulp to the broke pulp is (5-15): (35-45): (35: -45): (5-15).
And S120, respectively carrying out net-feeding forming on the slurry of the surface layer 11, the slurry of the surface lining layer 12, the slurry of the core layer 13, the slurry of the bottom lining layer 14 and the slurry of the bottom layer 15 with the net-feeding mass concentration of 0.2-0.26% respectively to form a net part of the surface layer 11, a net part of the surface lining layer 12, a net part of the core layer 13, a net part of the bottom lining layer 14 and a net part of the bottom layer 15.
In the embodiment of the application, the slurry of the surface layer 11, the surface lining layer 12, the core layer 13, the bottom lining layer 14 and the bottom layer 15 is controlled at a lower net-surfing mass concentration of 0.2-0.26%, so that the possibility of re-flocculation of dispersed fibers of each layer is greatly reduced, the uniformity of each layer is improved, and the mechanical strength of the copper paperboard can be improved. In the embodiment of the application, the mass concentration of the slurry on the top fabric of the top fabric 11, the top fabric liner 12, the core layer 13, the bottom fabric layer 14 and the bottom fabric layer 15 is controlled to be 0.2%, 0.21%, 0.22%, 0.23%, 0.24%, 0.25% or 0.26%, and the mass concentration of the slurry on the top fabric of the top fabric 11, the top fabric liner 12, the core layer 13, the bottom fabric layer 14 and the bottom fabric layer 15 may be different from each other, may be partially the same, or may be all the same.
Further, in the embodiment of the application, the ratio of the amount of the hanging sizing of the surface layer 11, the surface lining layer 12, the core layer 13, the bottom lining layer 14 and the bottom lining layer 15 is (16-20): 14-18): 45-49: (14-18): 16-20. According to the embodiment of the application, the size hanging amount of the surface layer 11, the surface lining layer 12, the core layer 13, the bottom lining layer 14 and the bottom layer 15 is controlled within the proportioning range, so that the size hanging amount of each layer is greatly reduced relative to three layers of base paper 10, rapid forming and dewatering after the pulp is sprayed to the net can be guaranteed, the quality of each layer is guaranteed, the dewatering time can be saved, and the manufacturing time of copper card paper is shortened.
Through reducing the volume of hanging thick liquid on every layer in this application embodiment, can be so that the copper card paper that generates is low ration, and copper card paper has excellent physical strength, can increase the deflection of copper card paper, in this application embodiment, the ration distributes at surface course 11, surface liner 12, sandwich layer 13, end liner 14 and bottom 15, and the five layer structure of body paper 10 makes the front and the reverse side of copper card paper all have better bearing structure, makes the deflection of copper card paper higher. In the embodiment of the application, the roughness of the front and the back of the copper card paper is lower, smoothness is higher, in the embodiment of the application, the slurry coating amount of the surface layer 11, the surface lining layer 12, the core layer 13, the bottom lining layer 14 and the bottom layer 15 is controlled, so that the nonuniformity of each layer can be compensated mutually, the nonuniformity of quantitative distribution is reduced, and the smoothness of the paper is improved.
S130, pressing the net part of the surface layer 11, the net part of the surface lining layer 12, the net part of the core layer 13, the net part of the bottom lining layer 14 and the net part of the bottom layer 15 into a laminated layer, applying surface glue layers on the upper surface and the lower surface of the laminated layer, and drying to obtain the copper paperboard, wherein the quantitative amount of the copper paperboard is less than or equal to 250 g/square meter.
In this application embodiment, with 11 net parts on surface course, 12 net parts on surface course, 13 net parts on sandwich layer, 14 net parts on bottom liner and 15 net parts on bottom together squeeze into one deck pressfitting layer, in this application embodiment, through applying the surface glue film at the upper surface and the lower surface of pressfitting layer, can seal the fibrous capillary hole of upper and lower surface on pressfitting layer to make the copper card paper that obtains have water-resistant ability, and simultaneously, in this application embodiment, through applying the surface glue film, can be so that the intensity reinforcing of copper card paper.
In another embodiment of the present application, as shown in fig. 4 and 2, a method for manufacturing a copper cardboard includes:
s210, preparing the pulp of the surface layer 11, the pulp of the surface lining layer 12, the pulp of the core layer 13, the pulp of the bottom lining layer 14 and the pulp of the bottom layer 15 respectively, wherein the pulp of the surface lining layer 12 and/or the pulp of the bottom lining layer 14 comprise hardwood sulfate pulp and deinked waste pulp.
In the embodiment of the application, the slurry corresponding to the five-layer structure is manufactured so as to be used for manufacturing the five-layer paper. In the present embodiment, the pulp of the top liner 12 and the bottom liner 14 includes hardwood kraft pulp and deinked waste pulp, and in other embodiments, the pulp of the top liner 12 or the bottom liner 14 may include hardwood kraft pulp and deinked waste pulp.
In the examples of this application, the hardwood kraft pulp and deinked waste pulp of the top liner 12 and/or the bottom liner 14 are present in a mass ratio of (40-50) to (50-60). By controlling the mass ratio of the hardwood sulfate pulp to the deinked waste pulp within the range of (40-50) to (50-60), the mechanical strength of the top liner 12 and the bottom liner 14 can be higher, and the requirement of the copper paperboard can be met.
Further, in the embodiment of the present application, the top layer 11 and the bottom layer 15 both comprise softwood kraft pulp and hardwood kraft pulp, wherein the mass ratio of the softwood kraft pulp to the hardwood kraft pulp is (25-35): (45-65). In the embodiment of the application, the crimping degree and the distortion coefficient of the formed fibers of the surface layer 11 and the bottom layer 15 can be reduced by controlling the mass ratio of the softwood kraft pulp to the hardwood kraft pulp, so that the fibers are stretched, and the surface layer 11 and the bottom layer 15 have better stiffness and higher mechanical strength.
In the embodiment of the present application, the core layer 13 includes softwood kraft pulp, deinked waste paper pulp, mechanical pulp, and broke pulp, and the mass ratio of the softwood kraft pulp, the deinked waste paper pulp, the mechanical pulp, and the broke pulp is: (5-15):(35-45):(35: -45):(5-15).
In the embodiment of the application, the sizing agents of the surface layer 11, the surface lining layer 12, the core layer 13, the bottom lining layer 14 and the bottom lining layer 15 all comprise internal sizing agents, wherein the internal sizing agents account for (0.04-0.08): 0.03-0.07): 0.10-0.14): 0.04-0.08): 0.03-0.07% in the sizing agents of the surface layer 11, the surface lining layer 12, the core layer 13, the bottom lining layer 14 and the bottom lining layer 15. In the embodiment of the application, the internal sizing agent is added into the sizing agent of each layer, and the dosage proportion of the internal sizing agent is controlled, so that the layers are combined firmly. In the embodiment of the present application, the internal sizing agent alkenyl succinic anhydride, and in other embodiments, the internal sizing agent may be other materials.
In the embodiment of the present application, the slurries of the top layer 11, the top liner layer 12, the bottom liner layer 14 and the bottom layer 15 respectively include (0 to 0.0002) parts by mass of a retention aid, and the slurry of the core layer 13 includes (0.00005 to 0.00025) parts by mass of a retention aid.
In the examples of this application, retention aids are added to the slurry formed in each layer, the retention aids primarily serving to aid in drainage of the slurry and to improve retention of fine components in the slurry during wet end formation. In the embodiment of the application, the quantitative ratio of each layer is smaller during the five-layer papermaking, the water filtering speed is higher during the wet-end forming, the influence of the dehydration speed on the paper forming is larger during the wet-end forming, the water filtering speed during the wet-end forming is controlled by reducing the material ratio of the retention aid at each layer and controlling the dosage ratio of the retention aid at each layer, the probability of breakage of each layer during the forming is reduced, and the quality of each layer is improved.
In the embodiment of the application, the slurry of the core layer 13 is added with a filling agent, and the filling amount of the filling agent accounts for 4% -6% of the absolute dry amount of the copper paperboard. In the embodiment of the application, the filler is added into the slurry of the core layer 13, and the filling amount of the filler in the core layer 13 is increased, so that the fiber consumption is reduced, the production cost can be greatly reduced, and the water filtration performance of the core layer 13 can be improved.
S220, respectively carrying out net-feeding forming on the slurry of the surface layer 11, the slurry of the surface lining layer 12, the slurry of the core layer 13, the slurry of the bottom lining layer 14 and the slurry of the bottom layer 15 with the net-feeding mass concentration of 0.2-0.26%, wherein the net-feeding forming slurry has the net speed ratio of 0.985, 0.98, 0.985, 098 and 0.965 in sequence, and forming a net part of the surface layer 11, a net part of the surface lining layer 12, a net part of the core layer 13, a net part of the bottom lining layer 14 and a net part of the bottom layer 15.
In the embodiment of the application, the slurry of the surface layer 11, the surface lining layer 12, the core layer 13, the bottom lining layer 14 and the bottom layer 15 is controlled at a lower net-surfing mass concentration of 0.2-0.26%, so that the possibility of re-flocculation of dispersed fibers of each layer is greatly reduced, the uniformity of each layer is improved, and the mechanical strength of the copper paperboard can be improved.
In the embodiment of the application, the pulp-screen speed ratio of each layer of the upper-layer forming is controlled to be 0.985, 0.98, 0.985, 098 and 0.965 in sequence, so that the problem that the copper paperboard is distorted or excessively warped in the generating process can be avoided, and the printing efficiency and quality are improved.
Further, in the embodiment of the application, the ratio of the amount of the hanging sizing of the surface layer 11, the surface lining layer 12, the core layer 13, the bottom lining layer 14 and the bottom lining layer 15 is (16-20): 14-18): 45-49: (14-18): 16-20. According to the embodiment of the application, the size hanging amount of the surface layer 11, the surface lining layer 12, the core layer 13, the bottom lining layer 14 and the bottom layer 15 is controlled within the proportioning range, so that the size hanging amount of each layer is greatly reduced relative to three layers of base paper 10, rapid forming and dewatering after the pulp is sprayed to the net can be guaranteed, the quality of each layer is guaranteed, the dewatering time can be saved, and the manufacturing time of copper card paper is shortened.
Through reducing the thick liquid volume of hanging on every layer in this application embodiment, can be so that the copper card paper that generates is low ration, and copper card paper has excellent physical strength, can increase the deflection of copper card paper, in this application embodiment, the ration distributes at surface course 11, surface liner 12, sandwich layer 13, end liner 14 and bottom 15, and the five layer structure of body paper 10 makes the front and the reverse side of copper card paper all have better bearing structure, makes the deflection of copper card paper glue high. In the embodiment of the application, the roughness of the front and the back of the copper card paper is lower, smoothness is higher, in the embodiment of the application, the slurry coating amount of the surface layer 11, the surface lining layer 12, the core layer 13, the bottom lining layer 14 and the bottom layer 15 is controlled, so that the nonuniformity of each layer can be compensated mutually, the nonuniformity of quantitative distribution is reduced, and the smoothness of the paper is improved.
And S230, pressing the net part of the surface layer 11, the net part of the surface lining layer 12, the net part of the core layer 13, the net part of the bottom lining layer 14 and the net part of the bottom layer 15 into a laminated layer, and applying surface glue layers on the upper surface and the lower surface of the laminated layer.
In this application embodiment, with 11 net parts on surface course, 12 net parts on surface course, 13 net parts on sandwich layer, 14 net parts on bottom liner and 15 net parts on bottom together squeeze into one deck pressfitting layer, in this application embodiment, through applying the surface glue film at the upper surface and the lower surface of pressfitting layer, can seal the fibrous capillary hole of upper and lower surface on pressfitting layer to make the copper card paper that obtains have water-resistant ability, and simultaneously, in this application embodiment, through applying the surface glue film, can be so that the intensity reinforcing of copper card paper.
In the embodiment of the application, the surface adhesive layer is starch, and in other embodiments, the surface adhesive layer may be made of other materials.
S240, respectively coating a coating layer 20 on the surface glue layer, and drying to obtain the copper paperboard, wherein the quantitative amount of the copper paperboard is less than or equal to 250 g/square meter.
In the embodiment of the application, the coating layer 20 is coated on the surface glue layer, so that the whiteness and the glossiness of the copper paperboard can be increased, and the requirement can be met. In the present embodiment, the coating layer 20 may include calcium carbonate, and in other embodiments, the coating layer 20 may be mineral substances such as china clay and kaolin. This application embodiment, through further drying, the stock form for copper card paper is flat, obtains copper card paper promptly.
For ease of understanding, the present application provides a specific embodiment, as follows:
example 1
The five-layer wire-overlapping type paper machine is adopted in the embodiment of the application, the width of the paper machine is 8.1m, the maximum running speed can reach 1300m/min, the width of the paper machine is large, the speed of the paper machine is high, and the process manufacturing difficulty is high. Specifically, in the embodiment of the application, the running speed of the paper machine is 900m/min, and the running speed is a suitable speed after the stability and the production efficiency of the equipment are integrated. If the vehicle speed is increased, the vibration of the machine equipment and the detection of instruments and meters exceed normal ranges, so that the equipment cannot be normally and stably produced for a long time, and the quality of the equipment can be unstable; if the vehicle speed is slow, the production efficiency is reduced and the economy is lowered.
In the embodiment of the application, the copper card paper comprises base paper 10, the base paper 10 sequentially comprises a surface layer 11, a surface lining layer 12, a core layer 13, a bottom lining layer 14 and a bottom layer 15, and the quantitative amount of the copper card paper is equal to 180 g/square meter; the base paper 10 basis weight is equal to 110 grams per square meter; the copper paperboard also comprises two coating layers 20, wherein one coating layer 20 is positioned on the side of the surface layer 11, which is far away from the surface lining layer 12, the other coating layer 20 is positioned on the side of the bottom layer 15, which is far away from the bottom lining layer 14, and the coating weight of the coating layer 20 is 70 g/square meter.
Table 1 sizing proportioning and sizing table for three-layer and five-layer base paper structures.
Wherein, as shown in the pulp proportion and the hanging pulp scale of the three-layer and five-layer base paper 10 structure of the table 1, the pulp of the surface lining layer 12 and the pulp of the bottom lining layer 14 both comprise broadleaf wood sulfate pulp (L pulp) and deinked waste paper pulp (DIP pulp) with the mass ratio of 45 percent to 55 percent; the surface layer 11 and the bottom layer 15 both comprise softwood kraft pulp (N pulp) and hardwood kraft pulp (L pulp) with the mass ratio of 30% to 70%; the core layer 13 comprises hardwood kraft pulp (L pulp), deinked waste paper pulp (DIP pulp), mechanical pulp and broke pulp in a mass ratio of 10% to 40% to 10%.
In the embodiment of the present application, the amount of the slurry coated on the surface layer 11 is 18 g/m, the amount of the slurry coated on the surface layer 12 is 16 g/m, the amount of the slurry coated on the core layer 13 is 47 g/m, the amount of the slurry coated on the bottom layer 14 is 16 g/m, and the amount of the slurry coated on the bottom layer 15 is 18 g/m.
Table 2 web speed ratio, ASA addition amount, assistant addition amount, and filler addition amount of the stock of three-layer and five-layer base paper structures.
As shown in the web speed ratio, the ASA addition amount, the assistant addition amount, and the filler addition amount of the pulp of the three-layer and five-layer base paper 10 structure of table 2, in the present embodiment, the pulp of the face layer 11, the face liner layer 12, the core layer 13, the bottom liner layer 14, and the bottom layer 15 all include an internal sizing agent, specifically, the internal sizing agent in the present embodiment is Alkenyl Succinic Anhydride (ASA), wherein the content percentage of the internal sizing agent in the pulp of the face layer 11 is 0.06%, the content percentage of the internal sizing agent in the pulp of the face liner layer 12 is 0.05%, the content percentage of the internal sizing agent in the pulp of the core layer 13 is 0.12%, the content percentage of the internal sizing agent in the pulp of the bottom liner layer 14 is 0.06%, and the content percentage of the internal sizing agent in the pulp of the bottom layer 15 is 0.05%.
In the embodiment of the present application, the pulp wire speed ratio of the pulp of the top layer 11, the pulp of the top lining layer 12, the pulp of the core layer 13, the pulp of the bottom lining layer 14 and the pulp of the bottom layer 15 which are respectively formed on the net is 0.985, 0.98, 0.985, 098 and 0.965 in sequence.
In the embodiment of the present application, the slurries of the top layer 11, the top liner layer 12, the bottom liner layer 14 and the bottom layer 15 respectively include 0.01 part by mass of a retention aid, and the slurry of the core layer 13 includes 0.015 part by mass of a retention aid, specifically, in the embodiment of the present application, the slurries of the top layer 11, the top liner layer 12, the bottom liner layer 14 and the bottom layer 15 respectively include 0.01% of a retention aid, and the core layer 13 includes 0.015% of a retention aid, based on the absolute dry amount.
In the embodiment of the present application, the core layer 13 includes a filler, and the filling amount of the filler accounts for 5% of the absolute dry amount of the copper paperboard.
In the embodiment of the present application, the front surface of the copper card paper is the surface of the copper card paper close to the surface layer 11, and the back surface of the copper card paper is the surface of the copper card paper close to the bottom layer 15. Through tests, in the examples of the present application, the roughness of the front surface of the obtained copper cardboard was 0.73 micrometers, the roughness of the back surface was 0.88 micrometers, the smoothness of the front surface was 443S, the smoothness of the back surface was 438S, the bubbling speed of the front surface was 2.19 m/S, the bubbling speed of the back surface was 2.26 m/S, the offset printing performance of both the front surface and the back surface was 3 times, the stiffness of the front surface was 1.13mN m, the stiffness of the back surface was 1.98mN m, and the interlayer strength of each layer of the copper cardboard was 232 joules/square meter.
In an embodiment of the present application, a method for manufacturing a copper cardboard includes: respectively preparing the pulp of the surface layer 11, the pulp of the surface lining layer 12, the pulp of the core layer 13, the pulp of the bottom lining layer 14 and the pulp of the bottom layer 15, wherein the pulp of the surface lining layer 12 and the pulp of the bottom lining layer 14 both comprise hardwood sulfate pulp and deinked waste paper pulp.
Respectively carrying out net feeding forming on the slurry of the surface layer 11, the slurry of the surface lining layer 12, the slurry of the core layer 13, the slurry of the bottom lining layer 14 and the slurry of the bottom layer 15 with the net feeding mass concentration of 0.24%, wherein the net feeding forming slurry speed ratio is 0.985, 0.98, 0.985, 098 and 0.965 in sequence, and forming a net part of the surface layer 11, a net part of the surface lining layer 12, a net part of the core layer 13, a net part of the bottom lining layer 14 and a net part of the bottom layer 15;
the net part of the surface layer 11, the net part of the surface lining layer 12, the net part of the core layer 13, the net part of the bottom lining layer 14 and the net part of the bottom layer 15 are squeezed together to form a laminated layer, surface glue layers are applied to the upper surface and the lower surface of the laminated layer, a coating layer 20 is respectively coated on the surface glue layers, and the copper paperboard is dried to obtain the copper paperboard, wherein the quantitative amount of the copper paperboard is equal to 180 g/square meter.
Comparative example 1
Comparative example 1 a three-ply, wire-lap paper machine was used, the running speed of which was 900 m/min.
In the comparative example 1, the copper card paper comprises base paper 10, the base paper 10 sequentially comprises a surface layer 11, a core layer 13 and a bottom layer 15, and the quantitative amount of the copper card paper is equal to 180 g/square meter; the base paper 10 basis weight is equal to 110 grams per square meter; the copper paperboard also comprises two coating layers 20, wherein one coating layer 20 is positioned on the side of the surface layer 11, which is far away from the surface lining layer 12, the other coating layer 20 is positioned on the side of the bottom layer 15, which is far away from the bottom lining layer 14, and the coating weight of the coating layer 20 is 70 g/square meter.
Wherein, as shown in the sizing agent proportion and the sizing table of the three-layer and five-layer base paper 10 structure of the table 1, the surface layer 11 and the bottom layer 15 respectively comprise softwood kraft pulp (N pulp) and hardwood kraft pulp (L pulp) with the mass ratio of 30% to 70%; the core layer 13 comprises hardwood kraft pulp (L pulp), deinked waste paper pulp (DIP pulp), mechanical pulp and broke pulp in a mass ratio of 10% to 40% to 10%.
In comparative example 1, the amount of sizing on the top layer 11 was 26 g/m, the amount of sizing on the core layer 13 was 63 g/m, and the amount of sizing on the bottom layer 15 was 26 g/m.
As shown in the web speed ratio, the ASA addition amount, the assistant addition amount, and the filler addition amount of the pulp of the three-layer and five-layer base paper 10 structure of table 2, the pulp of the face layer 11, the core layer 13, and the bottom layer 15 in comparative example 1 each include an internal sizing agent, specifically, the internal sizing agent in comparative example 1 is Alkenyl Succinic Anhydride (ASA), wherein the content percentage of the internal sizing agent in the pulp of the face layer 11 is 0.08%, the content percentage of the internal sizing agent in the pulp of the core layer 13 is 0.18%, and the content percentage of the internal sizing agent in the pulp of the bottom layer 15 is 0.08%.
In comparative example 1, the slurry of the face layer 11, the slurry of the core layer 13, and the slurry of the under layer 15 were respectively net-formed at a slurry-to-wire ratio of 0.975, 0.98, and 0.965 in this order.
In comparative example 1, the slurries of the top layer 11, the top liner layer 12, the bottom liner layer 14 and the bottom layer 15 respectively included 0.00015 part by mass of a retention aid, and the slurry of the core layer 13 included 0.0002 part by mass of a retention aid, specifically, in comparative example 1, the slurries of the top layer 11, the top liner layer 12, the bottom liner layer 14 and the bottom layer 15 respectively included 0.015% of a retention aid, and the core layer 13 included 0.02% of a retention aid, based on the absolute dry amount.
In comparative example 1, the core layer 13 included a filler in an amount of 2.5% of the absolute dry amount of the copper cardboard.
Table 3 test performance table of copper cardboard with three-layer and five-layer base paper structure.
As shown in table 3, the test performance of the copper card paper with the three-layer and five-layer base paper 10 structure is shown in the table, in comparative example 1, the front surface of the copper card paper is the surface of the copper card paper close to the surface layer 11, and the back surface of the copper card paper is the surface of the copper card paper close to the bottom layer 15. As a result of the test, in comparative example 1, the roughness of the front surface of the obtained copper cardboard was 0.89 μm, the roughness of the back surface was 0.9 μm, the smoothness of the front surface was 287S, the smoothness of the back surface was 275S, the bubbling speed of the front surface was 1.34 m/S, the bubbling speed of the back surface was 1.44 m/S, the offset printing performance of the front surface was 2 times, the stiffness of the front surface was 0.87mN m, the stiffness of the back surface was 1.79mN m, and the interlayer strength of each layer of the copper cardboard was 166 joules/square meter.
In comparative example 1, a method for manufacturing a copper cardboard, comprising: the slurry for the surface layer 11, the slurry for the core layer 13, and the slurry for the bottom layer 15 were prepared separately.
Respectively carrying out net feeding forming on the slurry of the surface layer 11, the slurry of the core layer 13 and the slurry of the bottom layer 15 with net feeding mass concentration of 0.3%, wherein the net speed ratio of the slurry formed by net feeding is 0.975, 0.98 and 0.965 in sequence to form a net part of the surface layer 11, a net part of the core layer 13 and a net part of the bottom layer 15;
and squeezing the net part of the surface layer 11, the net part of the core layer 13 and the net part of the bottom layer 15 into a laminated layer, applying surface glue layers on the upper surface and the lower surface of the laminated layer, respectively coating a coating layer 20 on each surface glue layer, and drying to obtain the copper paperboard, wherein the quantitative amount of the copper paperboard is equal to 180 g/square meter.
By comparing the embodiment 1 with the comparative example 1, it can be found that in the embodiment of the present application, the copper cardboard includes the base paper 10 formed by the five-layer structure, and the low-quantitative copper cardboard can reduce the sizing amount of the surface layer 11 and the bottom layer 15, and the cost of the sizing agent of the surface layer 11 and the bottom layer 15 is higher, so that the cost of the copper cardboard can be reduced. The mass concentration of surfing the net of each layer of this application is less, specifically, the mass concentration of surfing the net of each layer of this application embodiment is 0.24%, is far less than the mass concentration of surfing the net of 0.3% of the body paper 10 that three layer construction constitutes, has significantly reduced the possibility that every layer of dispersed fibre is flocculated again, improves the evenness of whole every layer to can improve the mechanical strength of copper card paper.
The embodiment of the application obtains the foaming speed and the offset printing performance of the front and the back with the same expenditure better because after adopting the five-layer papermaking process, each layer ration descends, and the dehydration speed rises, can reduce the thick liquids concentration of the upper forming net when each layer is made paper, and the thick liquids of low concentration can promote the evenness of paper when the shaping is dehydrated, and the better the cardboard evenness is, then the local intensity of cardboard is short the less, then foaming speed and offset printing performance are better. The better the blister speed and offset properties, the faster the paperboard can be printed. In the embodiment of the application, the interlayer strength of the copper paperboard is obviously enhanced to 232. The stiffness of this application embodiment strengthens, and when this application embodiment adopted five layers to make, sandwich layer 13 ration is low, and great ration distributes at surface course 11, lining, bottom 15, and this kind of structure plays a better bearing structure than the three-layer for the stiffness of copper card paper is than higher. The roughness of the front and the back of this application embodiment is lower, and smoothness degree is higher, in this application embodiment, through the coating amount of control surface course 11, face lining 12, sandwich layer 13, end liner 14 and bottom 15 for the inhomogeneity of each layer can compensate each other, reduces quantitative distribution's inhomogeneity, improves the smoothness degree of paper.
The embodiment of the application controls the pulp-screen speed ratio of the surface layer 11, the surface lining layer 12, the core layer 13, the bottom lining layer 14 and the bottom layer 15 so as to avoid the problem that the copper paperboard is distorted or excessively warped in the generation process, thereby improving the printing efficiency and quality.
The above embodiments are merely examples and are not intended to limit the scope of the present disclosure, and all modifications, equivalents, and flow charts using the contents of the specification and drawings of the present disclosure or those directly or indirectly applied to other related technical fields are intended to be included in the scope of the present disclosure.
Claims (10)
1. The copper card paper is characterized by comprising base paper, wherein the base paper sequentially comprises a surface layer, a surface lining layer, a core layer, a bottom lining layer and a bottom layer, and the quantitative amount of the copper card paper is less than or equal to 250 g/square meter;
wherein the pulp of the top liner and/or the bottom liner comprises hardwood kraft pulp and deinked waste pulp.
2. The cupper card as recited in claim 1, wherein the mass ratio of hardwood kraft pulp and deinked pulp of the top liner and/or the bottom liner is (40-50): (50-60).
3. The bronze card paper of claim 1, wherein the sizing amount ratio of the top layer, the top liner layer, the core layer, the bottom liner layer and the bottom liner layer is (16-20): (14-18): (45-49): (14-18): (16-20).
4. The copper card paper of claim 1, wherein the top layer and the bottom layer each comprise softwood kraft pulp and hardwood kraft pulp, wherein the mass ratio of the softwood kraft pulp to the hardwood kraft pulp is (25-35): (65-75).
5. The coppery card paper as recited in claim 1, wherein the slurries of the top layer, top liner layer, core layer, bottom liner layer and bottom layer each comprise an internal sizing agent, wherein the internal sizing agent comprises a ratio of (0.04-0.08): (0.03-0.07): (0.10-0.14): (0.04-0.08): (0.03-0.07) in the slurries of the top layer, top liner layer, core layer, bottom liner layer and bottom layer.
6. The coppery card paper as recited in claim 1, wherein the slurries of the top layer, the top liner layer, the bottom liner layer and the bottom layer respectively comprise (0-0.0002) parts by mass of a retention aid, and the slurry of the core layer comprises (0.00005-0.00025) parts by mass of a retention aid.
7. The copper card paper as claimed in claim 1, further comprising two coating layers, one coating layer being located on the side of the surface layer facing away from the surface lining layer, the other coating layer being located on the side of the bottom layer facing away from the bottom lining layer, wherein the basis weight of the base paper is 170 g/m or less.
8. The copper cardboard of claim 1, wherein the core layer comprises a filler, and the filler is added in an amount of 4% to 6% of the absolute dry amount of the copper cardboard.
9. A method for manufacturing a copper cardboard is characterized by comprising the following steps:
respectively manufacturing surface layer pulp, surface lining layer pulp, core layer pulp, bottom lining layer pulp and bottom layer pulp, wherein the surface lining layer pulp and the bottom lining layer pulp comprise hardwood sulfate pulp and deinked waste paper pulp;
respectively carrying out net-feeding forming on the surface layer slurry, the surface lining slurry, the core layer slurry, the bottom lining slurry and the bottom layer slurry with net-feeding mass concentration of 0.2-0.26% respectively to form a surface layer net part, a surface lining net part, a core layer net part, a bottom lining net part and a bottom layer net part;
and (2) squeezing the surface layer net part, the surface lining layer net part, the core layer net part, the bottom lining layer net part and the bottom layer net part together to form a laminated layer, applying surface glue layers on the upper surface and the lower surface of the laminated layer, and drying to obtain the copper paperboard, wherein the quantitative amount of the copper paperboard is less than or equal to 250 g/square meter.
10. The method for manufacturing a copper cardboard according to claim 9,
the pulp-mesh speed ratios of the pulp of the surface layer, the pulp of the surface lining layer, the pulp of the core layer, the pulp of the bottom lining layer and the pulp of the bottom layer which are respectively formed by being fed with the net are 0.985, 0.98, 0.985, 098 and 0.965 in sequence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110686094.2A CN113584946A (en) | 2021-06-21 | 2021-06-21 | Copper card paper and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110686094.2A CN113584946A (en) | 2021-06-21 | 2021-06-21 | Copper card paper and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113584946A true CN113584946A (en) | 2021-11-02 |
Family
ID=78244099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110686094.2A Pending CN113584946A (en) | 2021-06-21 | 2021-06-21 | Copper card paper and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113584946A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115787348A (en) * | 2022-12-02 | 2023-03-14 | 宁波亚洲浆纸业有限公司 | Coated card and preparation method thereof |
| CN116695487A (en) * | 2023-07-18 | 2023-09-05 | 宁波亚洲浆纸业有限公司 | paper jam |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2618941Y (en) * | 2003-05-13 | 2004-06-02 | 上海新伦纸业有限公司 | Environment protection card paper |
| WO2011151234A1 (en) * | 2010-06-02 | 2011-12-08 | Voith Patent Gmbh | Method for producing a coated multilayer fibrous web |
| CN105484106A (en) * | 2016-01-14 | 2016-04-13 | 河北昌泰纸业有限公司 | High-strength, water-resistant and environment-friendly kraft paper and preparation method |
| CN210766194U (en) * | 2019-07-30 | 2020-06-16 | 悦声纸业(中国)有限公司 | Compound coating craft paper |
| CN112553948A (en) * | 2020-10-22 | 2021-03-26 | 宁波亚洲浆纸业有限公司 | Card paper and production method thereof |
-
2021
- 2021-06-21 CN CN202110686094.2A patent/CN113584946A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2618941Y (en) * | 2003-05-13 | 2004-06-02 | 上海新伦纸业有限公司 | Environment protection card paper |
| WO2011151234A1 (en) * | 2010-06-02 | 2011-12-08 | Voith Patent Gmbh | Method for producing a coated multilayer fibrous web |
| CN105484106A (en) * | 2016-01-14 | 2016-04-13 | 河北昌泰纸业有限公司 | High-strength, water-resistant and environment-friendly kraft paper and preparation method |
| CN210766194U (en) * | 2019-07-30 | 2020-06-16 | 悦声纸业(中国)有限公司 | Compound coating craft paper |
| CN112553948A (en) * | 2020-10-22 | 2021-03-26 | 宁波亚洲浆纸业有限公司 | Card paper and production method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 刘全校: "《包装材料成型加工技术》", 31 January 2017, 文化发展出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115787348A (en) * | 2022-12-02 | 2023-03-14 | 宁波亚洲浆纸业有限公司 | Coated card and preparation method thereof |
| CN116695487A (en) * | 2023-07-18 | 2023-09-05 | 宁波亚洲浆纸业有限公司 | paper jam |
| CN116695487B (en) * | 2023-07-18 | 2025-05-23 | 宁波亚洲浆纸业有限公司 | Paper Jam |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103437242B (en) | White craft paper and production method thereof | |
| US11365517B2 (en) | Method for manufacturing a multi-layered paperboard, multi-layered paperboard and composition for use in multi-layered paperboard manufacturing | |
| EP4261346B1 (en) | Production of paper- or linerboard | |
| SE1050985A1 (en) | A paper or paperboard product and a process of manufacture of a paper or paperboard product | |
| CN113584946A (en) | Copper card paper and manufacturing method thereof | |
| CN104878659A (en) | White manila board and preparation method thereof | |
| US20240229358A9 (en) | Method for manufacturing a barrier film comprising highly refined cellulose | |
| US10145068B2 (en) | Process for producing at least one ply of a paper or board and a paper or board produced according to the process | |
| CN113981747A (en) | Card paper and preparation method thereof | |
| WO2015012167A1 (en) | Kraft paper and method for manufacturing kraft paper | |
| JP7172819B2 (en) | Substrate for liquid container, container for liquid, and method for producing the same | |
| EP4305239A1 (en) | Method for fractionation of highly refined cellulose | |
| JP4729544B2 (en) | Coated newsprint for offset printing | |
| CN108411704A (en) | A kind of high interfacial bonding strength dumb light U.S. line paper and preparation method thereof | |
| JP7243581B2 (en) | Liner base paper and liner base paper | |
| CN115976884B (en) | Paperboard and method for producing paperboard | |
| WO2025093338A1 (en) | Stretchable paper | |
| US20240240406A1 (en) | Multiply containerboard for use in corrugated board | |
| US20240263401A1 (en) | Multi-ply liner for use in corrugated board | |
| US20240240408A1 (en) | Multiply containerboard for use in corrugated board | |
| JP2023102542A (en) | Manufacturing method of carrier tape mount for chip type electronic component |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211102 |
|
| RJ01 | Rejection of invention patent application after publication |